memorial is expected to draw a who's who of leaders, david cameron, prince charles, afghanistan's hamid karzai and cuba's raul castro. joining me from south africa, nbc's ron allen. can you give me a sense of what it's like on the ground and the preparations that are under way. >> it's been an amazing few days since we've been here. in case you can't hear, it's raining, it's dark. there are still crowds out there chanting, choirs, is a mood of festivity, jubilation. also grief and mourning, but for the most part it's been a time of celebrating the life of nelson mandela. we've just achieved the official program for tomorrow. the service begins here around 11:00 a.m., which is 4:00 a.m. in the united states. they are expecting 80,000 people to jam the football stadium and the overflow crowds in at least three or four other stadiums. on the program we see there are several of nelson mandela's grandchildren that will speak. there are marks by secretary-general ban ki-moon. there are also remarks by foreign dignitaries including president obama. he will be followed by the president of brazil, chin